i'm waiting for mine! seems like a good time to start over.
louisb - todge and myself conversed about this shortly and in conclusion, lighter shock oil generaly give your more traction on asphalt, and less on carpet and vice cersa for heavier oil. for me when on carpet, lighter shock oil (40 wt) makes the car feel more responsive, faster react, and it helps in lower traction situations. where heavier oil doesnt allow the suspension to compress in low traction situations. and the car becomes skiddish. but under high traction situations, heavier oil helps the car dig in better by holding it flatter on reaction, that and more traction = more reaction to me atleast. i personally (on carpet that is) like blue/blue or green/blue (f/r). and i normally start w/ 50 wt.